Scattering Length of Thermal and Relativistic Charged Particles in Aperiodic Magnetic Fluctuations

Details Scattering Length of Thermal and Relativistic Charged Particles in Aperiodic Magnetic Fluctuations Scattering Length of Thermal and Relativistic Charged Particles in Aperiodic Magnetic Fluctuations

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...680..816s&link_type=abstract

The Astrophysical Journal, Volume 680, Issue 1, pp. 816-826.

Astronomy and Astrophysics

Astronomy

1

Ism: Cosmic Rays, Diffusion, Shock Waves, Turbulence

Scientific paper

We derive an expression for the scattering length λ of ionized particles in an initially unmagnetized plasma (B0=0). If λ is small compared to the dimension of the physical system L, the particles will be scattered effectively, which leads to an isotropization of the particle distribution in the physical system. We discuss two applications, nonrelativistic particles in the interstellar medium and highly relativistic particles in the jets of active galactic nuclei. As λ strongly grows with the particle velocity, the ratio λ/L is only small below a critical velocity which is calculated for different cosmic systems.

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